Review 10.1 - 10.3 Do you remember?!

What fractional part of a circle is an arc whose measure is  $200\degree$  

•  $\frac{5}{9}$  

•  $\frac{1}{3}$  

•  $\frac{5}{6}$  

•  $\frac{2}{3}$  

An arc is  $\frac{4}{5}$ of its circle. Find its degree measure.

•  $80\degree$  

•  $144\degree$  

•  $288\degree$  

•  $310\degree$  

In Circle O, arc DC measures  $100\degree$  . Find the measure of  $<ODC\$  .

•  $100\degree$  

•  $80\degree$  

•  $40\degree$  

•  $180\degree$  

Find the length of a chord that is 24 cm from the center of a circle whose diameter is 50.

• 7

• 14

• 24

• 25

Identify as Always, Sometimes, or Never.

In a circle, congruent chords are equidistant from the center.

• Always

• Sometimes

• Never

Identify as Always, Sometimes, or Never.

If a point is on a chord of a circle, then it is in the interior of the circle.

• Always

• Sometimes

• Never

Identify as Always, Sometimes, or Never.

Two arcs with the same measure are congruent.

• Sometimes

• Always

• Never

Find the length of the longest chord of a circle if the chord of a 60^o angle is 4.

• 2

• 4

• 8

• 16

In concentric circles with center at R,

RA = 26 and RB = 24. Find AC.

• 10

• 20

• 40

• 100

In circle O, arc AB =  $3x$ and 

arc BC =  $5x+20$  . Find  $m\angle BOC.$  

•  $20\degree$  

•  $120\degree$  

•  $180\degree$  

•  $60\degree$